<template>
  <sec-tree
    show-checkbox
    node-key="id"
    :data="data"
    :default-expanded-keys="[2, 3]"
    :default-checked-keys="[5]"
    :props="defaultProps"
  ></sec-tree>
</template>

<script>
export default {
  data() {
    return {
      data: [{
        id: 1,
        label: '一级 1',
        children: [{
          id: 4,
          label: '二级 1-1',
          children: [{
            id: 9,
            label: '三级 1-1-1',
          }, {
            id: 10,
            label: '三级 1-1-2',
          }],
        }],
      }, {
        id: 2,
        label: '一级 2',
        children: [{
          id: 5,
          label: '二级 2-1',
        }, {
          id: 6,
          label: '二级 2-2',
        }],
      }, {
        id: 3,
        label: '一级 3',
        children: [{
          id: 7,
          label: '二级 3-1',
        }, {
          id: 8,
          label: '二级 3-2',
        }],
      }],
      defaultProps: {
        children: 'children',
        label: 'label',
      },
    };
  },
};
</script>
